opengl-3

I've looked everywhere, but there seam to be no ruby binding that would allow to create OpenGL 3/4 context. It do not have to be complete OpenGL binding library, just portion that creates OpenGL context. Update: If I'm desperate enough I'll do partial glfw ruby binding with ruby ffi. So pls save me from that ;) I have written a library that can create an OpenGL 3 or 4 context on most platforms (provided it is supported). It's called Ray . You don't have to use its drawable system or DSL, you can just use it to create a window and an OpenGL context. Ray::GL.major_version = 3 Ray::GL.minor

ContextWin32::ContextWin32(WindowHandle parent, NLOpenGLSettings settings) : IPlatformContext(parent, settings) { int pf = 0; PIXELFORMATDESCRIPTOR pfd = {0}; OSVERSIONINFO osvi = {0}; osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); // Obtain HDC for this window. if (!(m_hdc = GetDC((HWND)parent))) { NLError("[ContextWin32] GetDC() failed."); throw NLException("GetDC() failed.", true); } // Create and set a pixel format for the window. pfd.nSize = sizeof(pfd); pfd.nVersion = 1; pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER; pfd.iPixelType = PFD_TYPE_RGBA; pfd

I am currently developing a framework that allows me to conveniently render a larger number of animated models. A model is organized as a simple hierarchy of bones, with the root being the torso/pelvis, generally: So, as pseudo code, I am currently rendering a model like this: RenderBone(Bone b, Mat4x4 currentTransform){ Mat4x4 pos = currentTransform * b.boneTransform; SetUniform("transformation", pos); Draw(bone.mesh); for each Bone bc in b.children do{ RenderBone(bc, pos); } } So for a single actor that uses a model with n bones I need n SetUniform (not counting stuff like setting textures)

I have OpenGL rendering code calling glDrawArrays that works flawlessly when the OpenGL context is (automatically / implicitly obtained) 4.2 but fails consistently (GL_INVALID_OPERATION) with an explicitly requested OpenGL core context 3.2. (Shaders are always set to #version 150 in both cases but that's beside the point here I suspect.) According to specs, there are only two instances when glDrawArrays() fails with GL_INVALID_OPERATION: "if a non-zero buffer object name is bound to an enabled array and the buffer object's data store is currently mapped" -- I'm not doing any buffer mapping at

I’m trying to compile a very simple “Hello world” OpenGL 3.3 program using FreeGLUT. In all the tutorials I found, they include an header “gl3.h”. The problem is, I don’t have such header file. $ ls -l /usr/include/GL/ total 2164 -rw-r--r-- 1 root root 8797 20 janv. 17:44 freeglut_ext.h -rw-r--r-- 1 root root 681 20 janv. 17:44 freeglut.h -rw-r--r-- 1 root root 26181 20 janv. 17:44 freeglut_std.h -rw-r--r-- 1 root root 837247 27 janv. 12:55 glew.h -rw-r--r-- 1 root root 656589 21 mars 18:07 glext.h -rw-r--r-- 1 root root 84468 21 mars 18:07 gl.h -rw-r--r-- 1 root root 128943 21 mars 18:07 gl

I had some 3D code that I noticed wouldn't render in a strict core profile but fine in a "normal" (not explicitly requested-as-core-only) profile context. To isolate the issue, I have written the smallest simplest possible OpenGL program drawing just a triangle and a rectangle: I have posted that OpenGL program as a Gist here . With the useStrictCoreProfile variable set to false, the program outputs no error messages to the console and draws a quad and a triangle as per the above screenshot, both on an Intel HD OpenGL 3.3 and on a GeForce with OpenGL 4.2. However , with useStrictCoreProfile

I have trouble rendering some geometry by using a vertex buffer object. I intend to draw a plane of points, so basically one vertex at every discrete position in my space. However, I cannot render that plane, as every time I call glDrawElements(...), application crashes returning an access violation exception. There must be some mistake while initialization, I guess. This is what I have so far: #define SPACE_X 512 #define SPACE_Z 512 typedef struct{ GLfloat x, y, z; // position GLfloat nx, ny, nz; // normals GLfloat r, g, b, a; // colors } Vertex; typedef struct{ GLuint i; // index } Index; //